Chemical Engineering Thermodynamics
Which of the following processes can not be made reversible even under ideal condition of operation?

Expansion of steam in a turbine
Free expansion of a gas
Compression of air in a compressor
All of these

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Chemical Engineering Thermodynamics
Gibbs-Duhem equation

None of these
Finds no application in gas-liquid equilibria involved in distillation
States that n₁dμ₁ + n₂dμ₂ + ....njdμj = 0, for a system of definite composition at constant temperature and pressure
Applies only to binary systems

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